HyperDrive ROM for Galaxy S3! [AT&T/T-Mobile/Sprint/Verizon/US Cellular/MetroPCS/Cricket]
For those of you who want some great themes (Galaxy S4, HTC Sense, Xperia Z, or AOSP) along with multi-window (enabled for all apps using Multi-Window control app), and lots of customization, check out the latest version of HyperDrive ROM. Also, the ROM offers complete customization of theme using Mophology (similar to MOAR ROM) if you want.